[deliverable/linux.git] / arch / mips / math-emu / ieee754.h

/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
 *
 *  Nov 7, 2000
 *  Modification to allow integration with Linux kernel
 *
 *  Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com
 *  Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
 */
#ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
#define __ARCH_MIPS_MATH_EMU_IEEE754_H

#include <linux/compiler.h>
#include <asm/byteorder.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <asm/bitfield.h>

union ieee754dp {
	struct {
		__BITFIELD_FIELD(unsigned int sign:1,
		__BITFIELD_FIELD(unsigned int bexp:11,
		__BITFIELD_FIELD(u64 mant:52,
		;)))
	};
	u64 bits;
};

union ieee754sp {
	struct {
		__BITFIELD_FIELD(unsigned sign:1,
		__BITFIELD_FIELD(unsigned bexp:8,
		__BITFIELD_FIELD(unsigned mant:23,
		;)))
	};
	u32 bits;
};

/*
 * single precision (often aka float)
*/
int ieee754sp_class(union ieee754sp x);

union ieee754sp ieee754sp_abs(union ieee754sp x);
union ieee754sp ieee754sp_neg(union ieee754sp x);

union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y);

union ieee754sp ieee754sp_fint(int x);
union ieee754sp ieee754sp_flong(s64 x);
union ieee754sp ieee754sp_fdp(union ieee754dp x);

int ieee754sp_tint(union ieee754sp x);
s64 ieee754sp_tlong(union ieee754sp x);

int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig);

union ieee754sp ieee754sp_sqrt(union ieee754sp x);

union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
				union ieee754sp y);
union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
				union ieee754sp y);
int ieee754sp_2008class(union ieee754sp x);
union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmax(union ieee754sp x, union ieee754sp y);
union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union ieee754sp y);

/*
 * double precision (often aka double)
*/
int ieee754dp_class(union ieee754dp x);

union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y);

union ieee754dp ieee754dp_abs(union ieee754dp x);
union ieee754dp ieee754dp_neg(union ieee754dp x);

union ieee754dp ieee754dp_fint(int x);
union ieee754dp ieee754dp_flong(s64 x);
union ieee754dp ieee754dp_fsp(union ieee754sp x);

int ieee754dp_tint(union ieee754dp x);
s64 ieee754dp_tlong(union ieee754dp x);

int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig);

union ieee754dp ieee754dp_sqrt(union ieee754dp x);

union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
				union ieee754dp y);
union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
				union ieee754dp y);
int ieee754dp_2008class(union ieee754dp x);
union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmina(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmax(union ieee754dp x, union ieee754dp y);
union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union ieee754dp y);


/* 5 types of floating point number
*/
enum {
	IEEE754_CLASS_NORM	= 0x00,
	IEEE754_CLASS_ZERO	= 0x01,
	IEEE754_CLASS_DNORM	= 0x02,
	IEEE754_CLASS_INF	= 0x03,
	IEEE754_CLASS_SNAN	= 0x04,
	IEEE754_CLASS_QNAN	= 0x05,
};

/* exception numbers */
#define IEEE754_INEXACT			0x01
#define IEEE754_UNDERFLOW		0x02
#define IEEE754_OVERFLOW		0x04
#define IEEE754_ZERO_DIVIDE		0x08
#define IEEE754_INVALID_OPERATION	0x10

/* cmp operators
*/
#define IEEE754_CLT	0x01
#define IEEE754_CEQ	0x02
#define IEEE754_CGT	0x04
#define IEEE754_CUN	0x08

/*
 * The control status register
 */
struct _ieee754_csr {
	__BITFIELD_FIELD(unsigned fcc:7,	/* condition[7:1] */
	__BITFIELD_FIELD(unsigned nod:1,	/* set 1 for no denormals */
	__BITFIELD_FIELD(unsigned c:1,		/* condition[0] */
	__BITFIELD_FIELD(unsigned pad0:3,
	__BITFIELD_FIELD(unsigned abs2008:1,	/* IEEE 754-2008 ABS/NEG.fmt */
	__BITFIELD_FIELD(unsigned nan2008:1,	/* IEEE 754-2008 NaN mode */
	__BITFIELD_FIELD(unsigned cx:6,		/* exceptions this operation */
	__BITFIELD_FIELD(unsigned mx:5,		/* exception enable  mask */
	__BITFIELD_FIELD(unsigned sx:5,		/* exceptions total */
	__BITFIELD_FIELD(unsigned rm:2,		/* current rounding mode */
	;))))))))))
};
#define ieee754_csr (*(struct _ieee754_csr *)(&current->thread.fpu.fcr31))

static inline unsigned ieee754_getrm(void)
{
	return (ieee754_csr.rm);
}
static inline unsigned ieee754_setrm(unsigned rm)
{
	return (ieee754_csr.rm = rm);
}

/*
 * get current exceptions
 */
static inline unsigned ieee754_getcx(void)
{
	return (ieee754_csr.cx);
}

/* test for current exception condition
 */
static inline int ieee754_cxtest(unsigned n)
{
	return (ieee754_csr.cx & n);
}

/*
 * get sticky exceptions
 */
static inline unsigned ieee754_getsx(void)
{
	return (ieee754_csr.sx);
}

/* clear sticky conditions
*/
static inline unsigned ieee754_clrsx(void)
{
	return (ieee754_csr.sx = 0);
}

/* test for sticky exception condition
 */
static inline int ieee754_sxtest(unsigned n)
{
	return (ieee754_csr.sx & n);
}

/* debugging */
union ieee754sp ieee754sp_dump(char *s, union ieee754sp x);
union ieee754dp ieee754dp_dump(char *s, union ieee754dp x);

#define IEEE754_SPCVAL_PZERO		0	/* +0.0 */
#define IEEE754_SPCVAL_NZERO		1	/* -0.0 */
#define IEEE754_SPCVAL_PONE		2	/* +1.0 */
#define IEEE754_SPCVAL_NONE		3	/* -1.0 */
#define IEEE754_SPCVAL_PTEN		4	/* +10.0 */
#define IEEE754_SPCVAL_NTEN		5	/* -10.0 */
#define IEEE754_SPCVAL_PINFINITY	6	/* +inf */
#define IEEE754_SPCVAL_NINFINITY	7	/* -inf */
#define IEEE754_SPCVAL_INDEF_LEG	8	/* legacy quiet NaN */
#define IEEE754_SPCVAL_INDEF_2008	9	/* IEEE 754-2008 quiet NaN */
#define IEEE754_SPCVAL_PMAX		10	/* +max norm */
#define IEEE754_SPCVAL_NMAX		11	/* -max norm */
#define IEEE754_SPCVAL_PMIN		12	/* +min norm */
#define IEEE754_SPCVAL_NMIN		13	/* -min norm */
#define IEEE754_SPCVAL_PMIND		14	/* +min denorm */
#define IEEE754_SPCVAL_NMIND		15	/* -min denorm */
#define IEEE754_SPCVAL_P1E31		16	/* + 1.0e31 */
#define IEEE754_SPCVAL_P1E63		17	/* + 1.0e63 */

extern const union ieee754dp __ieee754dp_spcvals[];
extern const union ieee754sp __ieee754sp_spcvals[];
#define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals)
#define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals)

/*
 * Return infinity with given sign
 */
#define ieee754dp_inf(sn)     (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
#define ieee754dp_zero(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
#define ieee754dp_one(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
#define ieee754dp_ten(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
#define ieee754dp_indef()	(ieee754dp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
						   ieee754_csr.nan2008])
#define ieee754dp_max(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
#define ieee754dp_min(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
#define ieee754dp_mind(sn)	(ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
#define ieee754dp_1e31()	(ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
#define ieee754dp_1e63()	(ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])

#define ieee754sp_inf(sn)     (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
#define ieee754sp_zero(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
#define ieee754sp_one(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
#define ieee754sp_ten(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
#define ieee754sp_indef()	(ieee754sp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
						   ieee754_csr.nan2008])
#define ieee754sp_max(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
#define ieee754sp_min(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
#define ieee754sp_mind(sn)	(ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
#define ieee754sp_1e31()	(ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
#define ieee754sp_1e63()	(ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])

/*
 * Indefinite integer value
 */
static inline int ieee754si_indef(void)
{
	return ieee754_csr.nan2008 ? 0 : INT_MAX;
}

static inline s64 ieee754di_indef(void)
{
	return ieee754_csr.nan2008 ? 0 : S64_MAX;
}

/*
 * Overflow integer value
 */
static inline int ieee754si_overflow(int xs)
{
	return ieee754_csr.nan2008 && xs ? INT_MIN : INT_MAX;
}

static inline s64 ieee754di_overflow(int xs)
{
	return ieee754_csr.nan2008 && xs ? S64_MIN : S64_MAX;
}

/* result types for xctx.rt */
#define IEEE754_RT_SP	0
#define IEEE754_RT_DP	1
#define IEEE754_RT_XP	2
#define IEEE754_RT_SI	3
#define IEEE754_RT_DI	4

/* compat */
#define ieee754dp_fix(x)	ieee754dp_tint(x)
#define ieee754sp_fix(x)	ieee754sp_tint(x)

#endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* MIPS floating point support
	3	* Copyright (C) 1994-2000 Algorithmics Ltd.
1da177e4	4	*
1da177e4 LT	5	* This program is free software; you can distribute it and/or modify it
	6	* under the terms of the GNU General Public License (Version 2) as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	12	* for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
3f7cac41	16	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1da177e4	17	*
1da177e4 LT	18	* Nov 7, 2000
	19	* Modification to allow integration with Linux kernel
	20	*
	21	* Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com
	22	* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
cd21dfcf	23	*/
a663bf90 RB	24	#ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
a663bf90 RB	25	#define __ARCH_MIPS_MATH_EMU_IEEE754_H
1da177e4	26
cae55066	27	#include <linux/compiler.h>
cd21dfcf	28	#include <asm/byteorder.h>
e812a739	29	#include <linux/kernel.h>
1da177e4	30	#include <linux/types.h>
cd21dfcf	31	#include <linux/sched.h>
f80cc08d	32	#include <asm/bitfield.h>
1da177e4	33
2209bcb1	34	union ieee754dp {
1da177e4	35	struct {
f80cc08d RB	36	__BITFIELD_FIELD(unsigned int sign:1,
	37	__BITFIELD_FIELD(unsigned int bexp:11,
	38	__BITFIELD_FIELD(u64 mant:52,
	39	;)))
49548b09	40	};
1da177e4	41	u64 bits;
2209bcb1	42	};
1da177e4	43
2209bcb1	44	union ieee754sp {
49548b09 RB	45	struct {
	46	__BITFIELD_FIELD(unsigned sign:1,
	47	__BITFIELD_FIELD(unsigned bexp:8,
	48	__BITFIELD_FIELD(unsigned mant:23,
	49	;)))
	50	};
1da177e4	51	u32 bits;
2209bcb1	52	};
1da177e4 LT	53
	54	/*
	55	* single precision (often aka float)
	56	*/
2209bcb1	57	int ieee754sp_class(union ieee754sp x);
1da177e4	58
2209bcb1 RB	59	union ieee754sp ieee754sp_abs(union ieee754sp x);
2209bcb1 RB	60	union ieee754sp ieee754sp_neg(union ieee754sp x);
1da177e4	61
2209bcb1 RB	62	union ieee754sp ieee754sp_add(union ieee754sp x, union ieee754sp y);
	63	union ieee754sp ieee754sp_sub(union ieee754sp x, union ieee754sp y);
	64	union ieee754sp ieee754sp_mul(union ieee754sp x, union ieee754sp y);
	65	union ieee754sp ieee754sp_div(union ieee754sp x, union ieee754sp y);
1da177e4	66
2209bcb1	67	union ieee754sp ieee754sp_fint(int x);
2209bcb1	68	union ieee754sp ieee754sp_flong(s64 x);
2209bcb1	69	union ieee754sp ieee754sp_fdp(union ieee754dp x);
1da177e4	70
2209bcb1	71	int ieee754sp_tint(union ieee754sp x);
2209bcb1	72	s64 ieee754sp_tlong(union ieee754sp x);
1da177e4	73
2209bcb1	74	int ieee754sp_cmp(union ieee754sp x, union ieee754sp y, int cop, int sig);
1da177e4	75
2209bcb1	76	union ieee754sp ieee754sp_sqrt(union ieee754sp x);
1da177e4	77
e24c3bec MC	78	union ieee754sp ieee754sp_maddf(union ieee754sp z, union ieee754sp x,
e24c3bec MC	79	union ieee754sp y);
83d43305 MC	80	union ieee754sp ieee754sp_msubf(union ieee754sp z, union ieee754sp x,
83d43305 MC	81	union ieee754sp y);
38db37ba	82	int ieee754sp_2008class(union ieee754sp x);
4e9561b2 MC	83	union ieee754sp ieee754sp_fmin(union ieee754sp x, union ieee754sp y);
4e9561b2 MC	84	union ieee754sp ieee754sp_fmina(union ieee754sp x, union ieee754sp y);
a79f5f9b MC	85	union ieee754sp ieee754sp_fmax(union ieee754sp x, union ieee754sp y);
a79f5f9b MC	86	union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union ieee754sp y);
e24c3bec	87
1da177e4 LT	88	/*
	89	* double precision (often aka double)
	90	*/
2209bcb1	91	int ieee754dp_class(union ieee754dp x);
1da177e4	92
2209bcb1 RB	93	union ieee754dp ieee754dp_add(union ieee754dp x, union ieee754dp y);
	94	union ieee754dp ieee754dp_sub(union ieee754dp x, union ieee754dp y);
	95	union ieee754dp ieee754dp_mul(union ieee754dp x, union ieee754dp y);
	96	union ieee754dp ieee754dp_div(union ieee754dp x, union ieee754dp y);
1da177e4	97
2209bcb1 RB	98	union ieee754dp ieee754dp_abs(union ieee754dp x);
2209bcb1 RB	99	union ieee754dp ieee754dp_neg(union ieee754dp x);
1da177e4	100
2209bcb1	101	union ieee754dp ieee754dp_fint(int x);
2209bcb1	102	union ieee754dp ieee754dp_flong(s64 x);
2209bcb1	103	union ieee754dp ieee754dp_fsp(union ieee754sp x);
1da177e4	104
2209bcb1	105	int ieee754dp_tint(union ieee754dp x);
2209bcb1	106	s64 ieee754dp_tlong(union ieee754dp x);
1da177e4	107
2209bcb1	108	int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cop, int sig);
1da177e4	109
2209bcb1	110	union ieee754dp ieee754dp_sqrt(union ieee754dp x);
1da177e4	111
e24c3bec MC	112	union ieee754dp ieee754dp_maddf(union ieee754dp z, union ieee754dp x,
e24c3bec MC	113	union ieee754dp y);
83d43305 MC	114	union ieee754dp ieee754dp_msubf(union ieee754dp z, union ieee754dp x,
83d43305 MC	115	union ieee754dp y);
38db37ba	116	int ieee754dp_2008class(union ieee754dp x);
4e9561b2 MC	117	union ieee754dp ieee754dp_fmin(union ieee754dp x, union ieee754dp y);
4e9561b2 MC	118	union ieee754dp ieee754dp_fmina(union ieee754dp x, union ieee754dp y);
a79f5f9b MC	119	union ieee754dp ieee754dp_fmax(union ieee754dp x, union ieee754dp y);
a79f5f9b MC	120	union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union ieee754dp y);
1da177e4 LT	121
	122
	123	/* 5 types of floating point number
	124	*/
9e8bad1f RB	125	enum {
	126	IEEE754_CLASS_NORM = 0x00,
	127	IEEE754_CLASS_ZERO = 0x01,
	128	IEEE754_CLASS_DNORM = 0x02,
	129	IEEE754_CLASS_INF = 0x03,
	130	IEEE754_CLASS_SNAN = 0x04,
	131	IEEE754_CLASS_QNAN = 0x05,
	132	};
1da177e4 LT	133
	134	/* exception numbers */
	135	#define IEEE754_INEXACT 0x01
	136	#define IEEE754_UNDERFLOW 0x02
	137	#define IEEE754_OVERFLOW 0x04
	138	#define IEEE754_ZERO_DIVIDE 0x08
	139	#define IEEE754_INVALID_OPERATION 0x10
	140
	141	/* cmp operators
	142	*/
	143	#define IEEE754_CLT 0x01
	144	#define IEEE754_CEQ 0x02
	145	#define IEEE754_CGT 0x04
	146	#define IEEE754_CUN 0x08
	147
cd21dfcf RB	148	/*
	149	* The control status register
	150	*/
	151	struct _ieee754_csr {
f1f3b7eb MR	152	__BITFIELD_FIELD(unsigned fcc:7, /* condition[7:1] */
	153	__BITFIELD_FIELD(unsigned nod:1, /* set 1 for no denormals */
	154	__BITFIELD_FIELD(unsigned c:1, /* condition[0] */
	155	__BITFIELD_FIELD(unsigned pad0:3,
	156	__BITFIELD_FIELD(unsigned abs2008:1, /* IEEE 754-2008 ABS/NEG.fmt */
	157	__BITFIELD_FIELD(unsigned nan2008:1, /* IEEE 754-2008 NaN mode */
f80cc08d RB	158	__BITFIELD_FIELD(unsigned cx:6, /* exceptions this operation */
	159	__BITFIELD_FIELD(unsigned mx:5, /* exception enable mask */
	160	__BITFIELD_FIELD(unsigned sx:5, /* exceptions total */
	161	__BITFIELD_FIELD(unsigned rm:2, /* current rounding mode */
f1f3b7eb	162	;))))))))))
1da177e4	163	};
eae89076	164	#define ieee754_csr ((struct _ieee754_csr )(&current->thread.fpu.fcr31))
1da177e4	165
cd21dfcf	166	static inline unsigned ieee754_getrm(void)
1da177e4 LT	167	{
	168	return (ieee754_csr.rm);
	169	}
cd21dfcf	170	static inline unsigned ieee754_setrm(unsigned rm)
1da177e4 LT	171	{
	172	return (ieee754_csr.rm = rm);
	173	}
	174
	175	/*
	176	* get current exceptions
	177	*/
cd21dfcf	178	static inline unsigned ieee754_getcx(void)
1da177e4 LT	179	{
	180	return (ieee754_csr.cx);
	181	}
	182
	183	/* test for current exception condition
	184	*/
cd21dfcf	185	static inline int ieee754_cxtest(unsigned n)
1da177e4 LT	186	{
	187	return (ieee754_csr.cx & n);
	188	}
	189
	190	/*
	191	* get sticky exceptions
	192	*/
cd21dfcf	193	static inline unsigned ieee754_getsx(void)
1da177e4 LT	194	{
	195	return (ieee754_csr.sx);
	196	}
	197
	198	/* clear sticky conditions
	199	*/
cd21dfcf	200	static inline unsigned ieee754_clrsx(void)
1da177e4 LT	201	{
	202	return (ieee754_csr.sx = 0);
	203	}
	204
	205	/* test for sticky exception condition
	206	*/
cd21dfcf	207	static inline int ieee754_sxtest(unsigned n)
1da177e4 LT	208	{
	209	return (ieee754_csr.sx & n);
	210	}
	211
	212	/* debugging */
2209bcb1 RB	213	union ieee754sp ieee754sp_dump(char *s, union ieee754sp x);
2209bcb1 RB	214	union ieee754dp ieee754dp_dump(char *s, union ieee754dp x);
1da177e4	215
1796ec77 MR	216	#define IEEE754_SPCVAL_PZERO 0 /* +0.0 */
	217	#define IEEE754_SPCVAL_NZERO 1 /* -0.0 */
	218	#define IEEE754_SPCVAL_PONE 2 /* +1.0 */
	219	#define IEEE754_SPCVAL_NONE 3 /* -1.0 */
	220	#define IEEE754_SPCVAL_PTEN 4 /* +10.0 */
	221	#define IEEE754_SPCVAL_NTEN 5 /* -10.0 */
	222	#define IEEE754_SPCVAL_PINFINITY 6 /* +inf */
	223	#define IEEE754_SPCVAL_NINFINITY 7 /* -inf */
90d53a91 MR	224	#define IEEE754_SPCVAL_INDEF_LEG 8 /* legacy quiet NaN */
	225	#define IEEE754_SPCVAL_INDEF_2008 9 /* IEEE 754-2008 quiet NaN */
	226	#define IEEE754_SPCVAL_PMAX 10 /* +max norm */
	227	#define IEEE754_SPCVAL_NMAX 11 /* -max norm */
	228	#define IEEE754_SPCVAL_PMIN 12 /* +min norm */
	229	#define IEEE754_SPCVAL_NMIN 13 /* -min norm */
	230	#define IEEE754_SPCVAL_PMIND 14 /* +min denorm */
	231	#define IEEE754_SPCVAL_NMIND 15 /* -min denorm */
	232	#define IEEE754_SPCVAL_P1E31 16 /* + 1.0e31 */
	233	#define IEEE754_SPCVAL_P1E63 17 /* + 1.0e63 */
1da177e4	234
49548b09 RB	235	extern const union ieee754dp __ieee754dp_spcvals[];
49548b09 RB	236	extern const union ieee754sp __ieee754sp_spcvals[];
2209bcb1 RB	237	#define ieee754dp_spcvals ((const union ieee754dp *)__ieee754dp_spcvals)
2209bcb1 RB	238	#define ieee754sp_spcvals ((const union ieee754sp *)__ieee754sp_spcvals)
1da177e4	239
cd21dfcf RB	240	/*
	241	* Return infinity with given sign
	242	*/
	243	#define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
	244	#define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
	245	#define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
	246	#define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
90d53a91 MR	247	#define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
90d53a91 MR	248	ieee754_csr.nan2008])
cd21dfcf RB	249	#define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
	250	#define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
	251	#define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
	252	#define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
	253	#define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])
	254
	255	#define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
	256	#define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
	257	#define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
	258	#define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
90d53a91 MR	259	#define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF_LEG + \
90d53a91 MR	260	ieee754_csr.nan2008])
cd21dfcf RB	261	#define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
	262	#define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
	263	#define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
	264	#define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
	265	#define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])
	266
	267	/*
	268	* Indefinite integer value
	269	*/
e812a739 RB	270	static inline int ieee754si_indef(void)
e812a739 RB	271	{
90d53a91	272	return ieee754_csr.nan2008 ? 0 : INT_MAX;
e812a739 RB	273	}
	274
	275	static inline s64 ieee754di_indef(void)
	276	{
90d53a91 MR	277	return ieee754_csr.nan2008 ? 0 : S64_MAX;
	278	}
	279
	280	/*
	281	* Overflow integer value
	282	*/
	283	static inline int ieee754si_overflow(int xs)
	284	{
	285	return ieee754_csr.nan2008 && xs ? INT_MIN : INT_MAX;
	286	}
	287
	288	static inline s64 ieee754di_overflow(int xs)
	289	{
	290	return ieee754_csr.nan2008 && xs ? S64_MIN : S64_MAX;
e812a739	291	}
1da177e4	292
1da177e4 LT	293	/* result types for xctx.rt */
	294	#define IEEE754_RT_SP 0
	295	#define IEEE754_RT_DP 1
	296	#define IEEE754_RT_XP 2
	297	#define IEEE754_RT_SI 3
	298	#define IEEE754_RT_DI 4
	299
1da177e4 LT	300	/* compat */
	301	#define ieee754dp_fix(x) ieee754dp_tint(x)
	302	#define ieee754sp_fix(x) ieee754sp_tint(x)
a663bf90 RB	303
a663bf90 RB	304	#endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */